Scatterplot
A scatterplot is a graph that displays the relationship between two quantitative variables.
Generally the:
- response variable is on the y-axis
- explanatory variable is on the x-axis
See also CH6 Lecture Notes.
Interpreting Scatterplots
Shape:
(Image provided in class, from CH6 Lecture Notes)
Trend:
(Image provided in class, from CH6 Lecture Notes)
Strength of Association:
- Scatterplots with large amounts of vertical variation indicate a weak association.
- Scatterplots with small amounts of vertical variation indicate a strong association.
(Image provided in class, from CH6 Lecture Notes)
Interactive Graph